Pump.



UNITE@ STATES PATENT @FFIQE PHILIP A. MYERS, OF ASHLAND, OHIO, ASSIGNORTO F. E. MYERS AND BROTHER, 0F ASHLAND, OHIO, A COPARINERSHIP.

PUMP.

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Speccation of Letters Patent.

Patented Feb. 22, 1910.

Application tiled April 19, 1909. Serial No. 490,657.

To all whom it may concern:

Be it known that I, PHILIP A. MYERs, a citizen of the United States,residing at Ashland, in the county of Ashland and State of Ohio, haveinvented certain new and useful Improvements in Pumps, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

This invention relates to improvements in pumps, of that characterwherein water is pumped by a pair of cylinders, one cylinder receivingits water supply from the other, and one cylinder also drawing` in airin addition to the water, so that the pump will discharge both water andair.

In an application iiled by me and my oint inventor, on February 11th,1909, Ser. No. 477,299, we disclose and claim such a pump whose chiefcharacteristic consists in different lengths of strokes of the pistons,with a sameness of diameter in the two cylinders, the longer stroke ofone piston, and, therefore, the greater length of its cylinder, givingsuch cylinder agreater capacity than the other, and this excess ofcapacity being filled with air.

In the present invention the chief characteristic is in utilizing thesame length of stroke of the two pistons, but using cylinders ofdifferent diameters, so that the excess of capacity of the one cylinderover the other is obtained not by a greater length, but by a greaterdiameter over the other. In both the pump of said joint application andin the pump of this present application, the two pistons employed aremoved simultaneously in opposite directions for the purpose of producinga pump which, with one cylinder of greater capacity than the other, theexcess being for pumping air, will discharge a continuous stream ofwater and air, the discharge being maintained on both strokes of thehandle.

rI"he present invention, therefore, has for its chief feature the twocylinders of different diameters, the larger one being supplied with anair inlet, and the two pistons of equal stroke and traveling in oppositedirections.

In the accompanying drawings Figure l is a vertical sectional View of apump embodying these improvements, with one form of operating meansshown essentially in side elevation; Fig. 2, an enlarged detail view invertical partial section and side elevation of this operating mechanism;and Fig. 3, a detail plan view of one of the piston rods, its cross-headand operating links.

Upon a special or conventional base l, adapted to be secured upon a wellplatform, I place and attach the pump proper, comprising a cylinder 2and a larger cylinder 3, which intercommunicate, and may be, as shown inthe present instance, of one continuous piece or casting, though this isnot material. Bolts and nuts 4f secure the cylinder 2 to this base, withan intervening packing 5 to prevent leakage. The base has a. cup 6within it, which, in effect, forms a cap for the lower end ofthecylinder 2. In this cup or cap is secured the water pipe, which extendsdown into the well or other source of supply. In this cup or cap is alsomounted a check-valve 7, of any approved or selected type, adapted tolift from its seat when the piston above it moves upward and to reseatand check the water in the cylinder when the piston moves downward.

At a suitable point the cylinder 3, preferably at its lower extremity,is provided with an air inlet valve 8, screwed into an orifice in theside of the cylinder and carrying, in the type shown, a butterfly valveproper l0, with a cock l1 screwed into the end of the valve casing S. Bythese means air is admitted into or, if desired, cut off from the largercylinder 3, or the quantity admitted controlled by the cock ll. It willbe observed that the cylinder 3 is of greater capacity than the cylinder2, say one-third or one-fourth more. This excess of capacity in onecylinder over the other is for the purpose of giving space for theindrawn air to enter and occupy, at the same time the larger cylinder ischarged with water, delivered to it from the smaller cylinder. Thecontents of the smaller cylinder will not till the larger, and thesurplus capacity of the larger is utilized to accommodate the indrawnair. In this way the larger cylinder becomes charged with both water andair and discharges both of them. From this it will be understood thatthis pump is Specially adapted for use with water and air storage tanksinto which water and air are pumped under pressure, that is, in whichpressure is created by the charging of the tank with air as well aswater, the air being compressed to form the pressure. This pressure isutilized to force the water from the tank into elevated or remote placesfor use in a water distribution plant, say in a residence or factory.Referring to the pistons for these cylinders, it will be seen that thesmaller piston 12 occupies the smaller cylinder and is connected to apiston-rod 13, which extends thence through both cylinders, and througha stuffing-box 14; then the larger piston 15 occupies` the largercylinder' and is connected at 16 with a hollow piston-rod 17, whichitself extends through a stuliing-box 1S, carried by the cap of thiscylinder, and also to the operating means. The stuffing-box llt isconveniently formed between the piston 15 and the lower end of thetubular piston-rod 17, as shown, and its function is to prevent aleakage of air or water about the inner piston-rod 13, it being notedthat this rod is within the tubular rod 17. At 19 is shown the dischargeorifice from the larger cylinder, out of which pass the water and theair to any suitable point of delivery, by means of any desiredconnection.

The pistons 12 and 15 are of any suitable type, being composed, in thepresent case, each of a shell having water passages 2O and carryingpackings 21, with a slidable cup 22, which, when the pistons aredescending, remains up and, when the pistons ar'e ascending, remainsdown and covers the water orifices 20, to preventthe water, which isbeing lifted by the pistons, from escaping.

I will now refer to one arrangement or construction of operating meansfor the piston-rods. In an open-work standard 23, secured to the cap ofthe upper cylinder, I mount an operating handle 24 having a toothedsegment 25, which meshes with a rack 26 secured to the upper end of thetubular piston-rod 17. Hence, on working the handle 24: up and down,reciprocating motion is imparted to the piston 15 in the largercylinder. Also mounted in the standard 28 is a mutilated gear, in thenature of a toothed segment 27, which meshes with the segment 25, is ofthe same diameter' and receives motion therefrom. A wrist-pin 28 on themutilated gear' 27, at a radius from the center of said gear equal tothe radius of the segment 25, actuates a link 29 whose upper endconnects with a cross-head 30 on the piston-rod 13. There are two ofthese wrist-pins and links, one at either side of the mutilated gear andat either end of the cross-head. Now it will be observed that when thehandle is swung downward to lift the piston 15, the same stroke willlower the piston 12, and when the handle is lifted, the piston 15 willdescend and the piston 12 will ascend. Thus the two pistons move at thesame time, but in opposite directions. IIence these operations takeplace z-The lower piston makes an upstroke and draws into its cylinder aquantity of water; it then descends, its valve opening, and on the nextor upward stroke, its valve closing, lifts the first quantity of waterinto the larger cylinder and draws in another supply into its owncylinder; the upper' piston is then at its lower limit, but startsupward as the lower piston again starts downward; the upper pistonlifting and forcing out this first charge of water, into which air wasdrawn, if the cock 11 was open during the initial strokes of the piston15, while the piston 12 was pumping in the first charge of water. Or thefew initial strokes may be made with the cock 11 closed and when thepump has once started, then the cock may be opened and the air be drawnin. In either case, after the first few initial strokes, the streambecomes continuous and, when the cock 11 is opened, is charged with air,to an extent substantially equal to the difference in the cubic capacityof the two cylinders.

Vhile I have used the terms upward and downward strokes of the pistonsand lifting water from one cylinder into another, it will be understoodthat these are only relative terms, dependent upon the position of thepump, and that if the pump were inclined or in a horizontal position,the same actions would take place and the same terms wouldapply, exceptas modified by such position of the pump. It is obvious too that in thisstructure the two cylinders may not be immediately adjacent and that thetwo pistons need not necessarily be connected with the same operatingmeans, so long as their strokes are in opposite directions at the sametime, so as to eflect the continuous water and air discharge.

I regard myself as the first to produce a combined water and air pumpwhe-rein are employed pistons having substantially equal strokes withcylinders of unequal capacity, the pistons moving in opposite directionsat the saine time, so that the capacity of one of the cylinders and itspiston will be greater than that of the other, and the streamcontinuous, combined with an air inlet leading into the cylinder havingthe greater capac` ity, so that the excess of capacity of that cylinderover the other will cause it to be supplied with air in addition to thewater it takes up, resulting in a continuous stream of air as well aswater.

It will be understood, of course, that the upper piston on itstip-stroke acts also to suck7 or lift the water from the lower'cylinder'.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In a pump of the character' described, the combination, of twocylinders of unequal diameters, the smaller having a water inlet and thelarger having a water outlet and an air inlet, and a piston and its rodfor each cylinder, and means for imparting substantially equal strokesto the pistons and in opposite directions.

2. ln a pump of the character described, the combination, of twocylinders of unequal diameters, the smaller having a water inlet andcommunicating with the larger, and the larger' having both a wateroutlet and an air inlet, and a piston and its rod for each cylinder, andmeans for imparting simultaneously substantially equal strokes to thepistons and in opposite directions.

3. in a pump of the character described, the combination, of twocylinders ot' unequal diameters, placed end to end andintercommunicating, the smaller cylinder having a valved water inlet andthe larger having a valved air inlet and a water outlet, and a pistonand its rod for each cylinder, and a common primary actuating meansoperating through adjuncts to impart simultaneously substantially equal.strokes to the pistons and in opposite directions.

4. in a pump of the character' described, the combination, of twocylinders of unequal diameters, the smaller having a water inlet and thelarger both an air inlet and a water outlet, and a piston and its rodfor each cylinder, one piston-rod working` through the other piston-rod,and means for imparting substantially7 equal strokes to the pistons andin opposite directions.

ln a pump of the character described, the combination, of two cylindersof unequal diameters, the smaller having a water inlet and the largerhaving both an air inletand a water outlet and arranged to receive waterfrom the smaller cylinder, and a piston and its rod for each cylinder,the rod of the smaller piston passing through that of the larger piston,and a primary actuating means operating through adjuncts to impartsimultaneous equal strokes in opposite directions to the rods.

G. In a pump ot the character described, a base, a cylinder mountedthereon with a valved water inlet, a larger cylinder opening into andmounted upon the first named cylinder, a valved air inlet for the largercylinder and a water outlet, a piston and a hollow rod for the largercylinder, a piston for the smaller cylinder and its rod passing throughthe other piston, a lever or handle connected with both rods by meanswhich impart substantially equal strokes in opposite directionssimultaneously to the rods.

7. ln a pump of the character described, a lever or handle, a piston andits rod connected with the handle or lever to receive motion therefrom,a smaller piston and its rod, and means connecting it with the handle orlever and adapted to operate it simultaneously with the actuation of thefirst named rod, but in the opposite direction, in strokes ofsubstantially equal length with the strokes ot' the lirst named rod. y

8. In a pump of the character described, a standard, a handle with atoothed segment ulcrumed thereon, a mutilated gear meshing with thesegmentand journaled in the standard, and having wrist-pins, whoseradius is substantially equal to the radius of the segment, a piston andits rod meshing with the segment and another piston having a cross-headand links connecting the crosshead to the wrist-pins.

ln testimony whereof, I affix my signature in presence of two witnesses.

PHILIP A. MYERS. Witnesses H. A. REAsER, R. M. TUBES.

